1 files changed, 3 insertions, 1 deletions
diff --git a/ls-tree.c b/ls-tree.c
index e21e44c..5189930 100644
--- a/ls-tree.c
+++ b/ls-tree.c
@@ -3,7 +3,9 @@
  *
  *	Copyright (c) 1997--2021 Martin Mares <mj@ucw.cz>
  *
- *	Can be freely distributed and used under the terms of the GNU GPL.
+ *	Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ *	SPDX-License-Identifier: GPL-2.0-or-later
  */
 
 #include <stdarg.h>